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Ecology & Environment
Mahesh

04/04/22 15:14 PM IST

Surat gets India’s first steel slag road

In News 
  • Surat has become the first city in the country to get a processed steel slag (industrial waste) road.
Details 
  • It was built as part of a joint-venture project by the Council of Scientific and Industrial Research (CSIR), Central Road Research Institute (CRRI), Union Ministry of Steel, government think-tank NITI Ayog, and ArcelorMtttal-Nippon Steel (AM/NS), at Hazira.
  • This project falls under the initiative of the Waste to Wealth and Clean India Campaign.
  •  The construction cost of the processed steel slag road is 30 per cent cheaper than roads built from natural aggregates.
  • The thickness of the road is also 30 per cent lesser than normal ones, while the durability is much longer due to the utilisation of steel slag.
Process 
  • The slag is generated from a steel furnace burning at around 1,500-1,600 degree centigrade in the form of molten flux material as an impurity.
  • The molten material is poured into the slag pits for cooling as per the customized procedure and further processed to develop stable steel slag aggregates, with better material properties in place of the natural aggregate commonly used in road constructions.
Benefits 
  • The utilisation of processed steel slag in road construction paves the way for sustainable use of waste and reduces the reliance on perishable natural aggregates.
  • This process is also expected to reduce GHG emissions and carbon footprint in road construction activity and is in line with India’s commitment to the United Nations Sustainable Development Goal No. 9.
  • The approximate construction cost per square meter of a processed steel slag road is Rs 1,150 as against Rs 1,300 for a bitumen road and Rs 2,700 for a cement or a concrete one.
  • The lifespan of a cement or concrete road is over 30 years while that of bitumen and steel slag road is around 15 years.
Source-Indian Express 

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